#include<bits/stdc++.h>
using namespace std;
int x,y,z,h;
double p;
int main(){
	cin>>x>>y>>z;
	h=x+y+z;
	p=(x+y+z)/3.0;
	cout<<h<<endl<<fixed<<setprecision(1)<<p;
}
/**************************************************************
	Problem: 1602
	User: zhangziang
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/